Washington, D.C. proper has scarce, pricey stations; Exxon, Shell, BP and Sunoco; so most drivers fill in Maryland or Virginia along the Beltway (I-495), where Costco, Wawa and Sheetz compete hard. EIA weekly data covers the market. EV charging is strong across the region's garages and retail hubs.
Only 74 of the 493 stations mapped in Washington say whether they sell diesel. The rest probably do; nobody has recorded it. See Washington on the map →
Plan your stop
In Washington the filters that actually narrow things down are diesel (74). Travelling at night, switch on "open now": 127 places are tagged 24/7. When you arrive, a quick confirmation keeps the map right for the next driver in Washington.